INA231AIYFFR

Current Regulation/Management Overview

The INA231AIYFFR is a current shunt and power monitor featuring a 1.8V I2C-compatible interface with 16 programmable addresses. It supports high-side or low-side bidirectional measurements of bus voltages ranging from 0V to 28V. Powered by a single 2.7V to 5.5V supply, it draws a typical supply current of 330μA. The device offers high precision with a maximum gain error of 0.5% and a maximum offset voltage of 50μV. It includes configurable averaging options and programmable alert thresholds for enhanced protection.

Current Regulation/Management Feature Summary

• Provides direct reading of current in amperes and power in watts through programmable calibration values and internal multipliers.
• Features an ALERT pin that activates when monitored current, voltage, or power exceeds user-programmable limits.
• Supports both continuous conversion startup mode and low-current shutdown startup mode for flexible system initialization.

Current Regulation/Management Applications

• High-side or low-side current monitoring in industrial control systems
• Power management monitoring in portable battery-operated devices
• Overcurrent protection circuits in server and telecom infrastructure

Current Regulation/Management Procurement Notes

Verify the specific suffix 'AIYFFT' versus 'AIYFFR' as they may indicate different packaging or revision statuses. Confirm RoHS compliance and lead times directly with Texas Instruments or authorized distributors, as availability can vary. Ensure the I2C address configuration matches your system design requirements before finalizing procurement.

Current Regulation/Management Selection Notes

Select this component when precise bidirectional current and power monitoring is required with minimal host processor overhead. The 1.8V I2C interface ensures compatibility with low-voltage digital controllers. Consider the 0.5% gain error and 50μV offset specifications for applications demanding high measurement accuracy across the 0V to 28V bus voltage range.

Current Regulation/Management Part Context

The INA231 belongs to Texas Instruments' family of current and power monitors designed for systems requiring accurate energy measurement. It integrates analog-to-digital conversion and digital processing to simplify interface with microcontrollers. The device is part of a broader portfolio including similar models like the INA230 and INA240, tailored for various precision and speed requirements.

Current Regulation/Management Replacement Considerations

The INA231AIYFFR is a tape-and-reel variant of theINA231AIYFFT. Verify if the tray-packaged version is acceptable for your assembly process. No direct functional substitutes are listed; consider the INA230 for lower cost or INA240 for higher bandwidth needs if specifications allow.

Current Regulation/Management FAQ

What is the difference between INA231A and INA231B versions?

The INA231A starts up in a mode that performs continuous conversions of shunt and bus voltage. The INA231B starts up in a low-current shutdown mode, which is beneficial for reducing power consumption during initial system states.

How does the device handle overcurrent conditions?

The INA231 allows users to program alert thresholds for current, voltage, and power. When any of these parameters exceed the programmed limits, the ALERT pin is driven active to signal the host controller.